/sys$common/syshlp/helplib.hlb SPAWN, Qualifiers, /PROCESS  *Conan The Librarian (sorry for the slow response - running on an old VAX)

       /PROCESS=subprocess-name

    Specifies the name of the subprocess to be created. If you omit
    the /PROCESS qualifier, a unique process name is assigned with
    the same base name as the parent process and a unique number. The
    default subprocess name format is username_n. If you specify a
    process name that already exists, an error message is displayed.
    If the /LOG qualifier has been specified, the assigned name of
    the subprocess is displayed.